Method of making round brushes



1951 w. c. LEETE METHOD OF MAKING ROUND BRUSHES Filed May 8, 1948 Patented Aug. 28, 1951 METHD20RMAKING RODNDBRUSQESJ Will m .Leeta gme'ad mM ss ApplLcationMay-S; 1948,-S;erial.No. 2538193;

' Thi n enti n relatestc-a me hod Q -makina rou d bru h Qt th -ty euse n hyd aulicbrush ma be o a enr pe l i wel .kno nl t e art.

The method of the present invention is p.3 1?

ticularly'useful in making a brush of good quality, formed in a manner as to permit ready passage of water throughthe brush and to difus and. a ply, th Water. di ec ly wher quired, continuouslyand'uniformly, and to make such a brush at much less than the usualcost of round brushes used heretofore in. devices of this nature.

--In the drawings:

Fig. 1 is a diagrammatic view .oi an apparatus used in-the practice of this method;

Fig 2 is. a plan view of a portion ,of Fig. 1,=

Fig. 3 is a side elevation of the-brush p oduct;

Fig. 4 is a sectionalwiew. oi'a-brushhqlder; and

Fig. 5 is a view on line 5-5'of Fig. 3.

An example for practicing the new method will be seen from considering these figures.

Strips I and 2 (Fig. 1) of rubber stripping material or other suitable backing material impervious to water and approximately two inches in width, are fed from stock feed reels 3 and 4. Strip I from feed reel 3 passes under a holddown roll 5 and over a coating roll 6, the latter being partially immersed and rotatable in a tank I filled with latex or rubber cement or other suitable adhesive substance. The strip is then passed under a second hold-down roll 8 to the bight of squeeze rolls 9 where it converges with strip 2 being fed from reel 4.

A hopper IE] is filled with bundles I I of bristles, the bundles being approximately twelve inches in length in the present example. The bundles II are dropped singly from the hopper in the path of a spring pressed plunger I2 of a reciprocating device I2 which inserts a bundle at spaced intervals into the bight of squeeze rolls 9 and crosswise between the two continuously fed backing strips I and 2. The backing strips centrally encompass each bundle of bristles passing between squeeze rolls 9. The latex or rubber cement on strip I spreads among the bristles and bonds each bundle II to the two strips to form a series of spaced bundles with ,-Qiaim (o1. .39 '-21 str I 1 and ir e. zmi na ed fy th -adh ive the interveningspaces between bundles. '4. continuous laminated... strip. thus... f armed. with sa ced unwss 'Qf br sasi i Bac sand a e i no d biou ie midd Q he ndles-ll a h o i uous laminated strip. witl hitsfls'paced llayllr rllesv (Fig. .2)? is fed centrally. aga ndfia .slitlqer knife I3, which. splitsit inhalf. Pre s' sure' rolls, Id'and .I5(Eig' 1) guide the strip past the'slitte f knife 13. "Ad; ditional squeeze, rolls. I6 are provided to, further ol dif h ew We s parate.- tr ps 11." and Hi s'gueezingout. a he;ati..ofi ,atex. 3 .511111? SQVHQQ s s: 'el s til-be.later.tlses iiirv bon insi urnos The severed. halves. Iii-an lBTQf. the strip,- I wa er; wi h an-,.adh s .ve. .as;.latex r rub er mea itheir ettomr ur aees s n i a by pa n them o erlaco in roll.19; p r ally mm s dans rq atablein adhe ive. nk. 2Q. Strips ITand IIBare then turned in opposite.

directions and twisted. y..r .0l1's; Z'I s0-. l ,at the. .istl s. Will be d sposed June tree nds oithe. wardly- T is prou istWo fvvindinetapes sash 0i hich sui sd by guide r s zz'ito a sp dle ZSXFiE-Q) a brushf'back ushold r 43 The tape is he u i 'a ound t sp ndle o at filiteundbrllsh ssni 11y bu lt. unq ia h ckin form. "Theendofeach' stripas tape 'I'Tand I8 is hooked or otherwise held in one of the slots 25 in spindle 23 and the holders rotated to cause the strips to wind around the spindle. Each strip, being tacky from the latex or rubber cement coating, bonds together in spiral form.

It will be especially noted that the bulges made by the bristle tufts or bundles as they ar wound on the spindle will space the strips concentrically in more or less honey comb manner to permit the flow of water throughout the entire bristle area of the brush (Fig. 5).

The latex or rubber cement coated on strips I! and I8 by coating roll I9 will adhere and bond the peripheral winding to the sides of the holders and the excess bead of latex or cement squeezed out by rolls I6 will bond the bristles and the strips to the bottoms of the holders.

When holders 24 are filled, the strips are cut and end portions tucked in. The brush assembly (Fig. 3) may then be lowered, holder end first, into latex or suitable adhesive to a depth of approximately one fourth inch above the top of the holder 24 to bond all parts. This additional sealing of the brush into the backing holder may be accomplished, of course, in any other suitable manner.

The resulting product, when the adhesive has set, is, a brush which will be continuously flushed by water entering through inlet of spindle 23 (Fig. 4) to carry away dirt loosened by the brush action.

The water is spread throughout the base of the brush by permitting water to pass through holes 26 in the sides of the spindle to a circular cavity 21 in the base of the holder. Holes 28 in the bottom thereoi thus difiuse the water throughout the entire brush area.

I claimf 1. The method of forming a round brush which comprises coating one side of a strip of backing material with an adhesive substance, bringing said coated strip in contact with a second strip with the adhesive between the two strips, squeezing the strips together while intermittently feeding crosswise between them and centrally encompassing preformed undivided bundles of bristles of greater length than the strip width to form a continuous laminated strip of backing material with spaced bundles of bristles bonded therein and the free end portions thereof extending from opposite sides of said strip, severing said laminated strip longitudinally, winding each strip half on the spindle of a circular backing form, severing a strip when the form is full, and adding additional adhesive in the backing form to bind the assembled brush firmly in its backing.

2. The method of forming a round brush which comprises coating one side of a strip of backing material with an adhesive substance, bringing said coated strip in contact with a second strip with the adhesive between the two strips, squeezing the strips together while intermittently feeding crosswise between them undivided bundles of bristles of greater length than the width of the strip to form a continuous laminated strip of backing material with spaced bundles of bristles bonded therein, splitting said laminated strip and bundles held therein centrally of the strip to form two similar continuous strips, winding said two strips on spindles of backing forms, disposing the unattached ends of the bristles outwardly of said forms, severing each of the strips when the backing forms are full, and adding adhesive directly to each backing form to bind the brush so assembled therein firmly to the form.

3. The method of forming a round brush in a circular backing form provided with a centrally disposed spindle construction, which method consistsin coating one side of a strip of backing material with an adhesive impervious to water, bringing said strip together longitudinally with a strip of similar material and with the coated side of said first strip facing the second, progressively squeezing the two strips together while successively inserting crosswise and centrally squeezing between them at the point of contact of said strips preformed undivided bundles of bristles of greater with than said strips, slitting the resulting laminated strip to form two tapes with unattached bristle ends extending from the outer edge thereof, squeezing said tapes adjacent their inner edges to further bond the bundles of bristles in the tape and press some adhesive from the severed bristle ends, adhesively coating one side of each tape, tuming the same edgewise for upward disposal of the unattached bristle ends, fixing the loose end of each tape to the spindle of the backing form, turning said spindle to wind said tape spirally in the form, severing the tape when the form is full, and adding adhesive to the backing form and tape to bind the assembled brush in the form.

WILLIAM C. LEETE.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 570,261 Mumford Oct. 27, 1896 696,104 Mumford Mar. 25, 1902 1,209,639 Carter Dec. 19, 1916 1,259,031 Mather Mar. 12, 1918 1,259,571 Weins Mar. 19, 1918 2,294,480 Rohweder Sept. 1, 1942 2,363,685 Neuschafer Nov. 28, 1944 

